/**
 * @license
 * Copyright 2025 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { AI } from '../public-types';
import { ImagenGCSImage, ImagenGenerationConfig, ImagenInlineImage, RequestOptions, ImagenModelParams, ImagenGenerationResponse, ImagenSafetySettings, SingleRequestOptions } from '../types';
import { AIModel } from './ai-model';
/**
 * Class for Imagen model APIs.
 *
 * This class provides methods for generating images using the Imagen model.
 *
 * @example
 * ```javascript
 * const imagen = new ImagenModel(
 *   ai,
 *   {
 *     model: 'imagen-3.0-generate-002'
 *   }
 * );
 *
 * const response = await imagen.generateImages('A photo of a cat');
 * if (response.images.length > 0) {
 *   console.log(response.images[0].bytesBase64Encoded);
 * }
 * ```
 *
 * @deprecated All Imagen models are deprecated and will shut down as
 * early as June 2026. As a replacement, you can
 * {@link https://firebase.google.com/docs/ai-logic/imagen-models-migration |
 * migrate your apps to use Gemini Image models (the "Nano Banana" models)}.
 *
 * @public
 */
export declare class ImagenModel extends AIModel {
    requestOptions?: RequestOptions | undefined;
    /**
     * The Imagen generation configuration.
     */
    generationConfig?: ImagenGenerationConfig;
    /**
     * Safety settings for filtering inappropriate content.
     */
    safetySettings?: ImagenSafetySettings;
    /**
     * Constructs a new instance of the {@link ImagenModel} class.
     *
     * @param ai - an {@link AI} instance.
     * @param modelParams - Parameters to use when making requests to Imagen.
     * @param requestOptions - Additional options to use when making requests.
     *
     * @throws If the `apiKey` or `projectId` fields are missing in your
     * Firebase config.
     */
    constructor(ai: AI, modelParams: ImagenModelParams, requestOptions?: RequestOptions | undefined);
    /**
     * Generates images using the Imagen model and returns them as
     * base64-encoded strings.
     *
     * @param prompt - A text prompt describing the image(s) to generate.
     * @returns A promise that resolves to an {@link ImagenGenerationResponse}
     * object containing the generated images.
     *
     * @throws If the request to generate images fails. This happens if the
     * prompt is blocked.
     *
     * @remarks
     * If the prompt was not blocked, but one or more of the generated images were filtered, the
     * returned object will have a `filteredReason` property.
     * If all images are filtered, the `images` array will be empty.
     *
     * @public
     */
    generateImages(prompt: string, singleRequestOptions?: SingleRequestOptions): Promise<ImagenGenerationResponse<ImagenInlineImage>>;
    /**
     * Generates images to Cloud Storage for Firebase using the Imagen model.
     *
     * @internal This method is temporarily internal.
     *
     * @param prompt - A text prompt describing the image(s) to generate.
     * @param gcsURI - The URI of file stored in a Cloud Storage for Firebase bucket.
     * This should be a directory. For example, `gs://my-bucket/my-directory/`.
     * @returns A promise that resolves to an {@link ImagenGenerationResponse}
     * object containing the URLs of the generated images.
     *
     * @throws If the request fails to generate images fails. This happens if
     * the prompt is blocked.
     *
     * @remarks
     * If the prompt was not blocked, but one or more of the generated images were filtered, the
     * returned object will have a `filteredReason` property.
     * If all images are filtered, the `images` array will be empty.
     */
    generateImagesGCS(prompt: string, gcsURI: string, singleRequestOptions?: SingleRequestOptions): Promise<ImagenGenerationResponse<ImagenGCSImage>>;
}